./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:20:48,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:20:48,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:20:48,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:20:48,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:20:48,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:20:48,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:20:48,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:20:48,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:20:48,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:20:48,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:20:48,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:20:48,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:20:48,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:20:48,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:20:48,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:20:48,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:20:48,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:20:48,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:20:48,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:20:48,995 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:20:48,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:20:48,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:20:48,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:20:48,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:20:48,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:20:49,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:20:49,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:20:49,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:20:49,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:20:49,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:20:49,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:20:49,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:20:49,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:20:49,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:20:49,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:20:49,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:20:49,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:20:49,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:20:49,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:20:49,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:20:49,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:20:49,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:20:49,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:20:49,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:20:49,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:20:49,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:20:49,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:20:49,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:20:49,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:20:49,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:20:49,049 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:20:49,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:20:49,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:20:49,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:20:49,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:20:49,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:20:49,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:20:49,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:20:49,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:20:49,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:20:49,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:20:49,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:20:49,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:20:49,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:20:49,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:20:49,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:20:49,053 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:20:49,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:20:49,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:20:49,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a12f7bc3d94ecbf6fd25030121af7b8c4b258a536df3d333f191aa6387ec429b [2022-07-13 22:20:49,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:20:49,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:20:49,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:20:49,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:20:49,263 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:20:49,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-07-13 22:20:49,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8571e77/5c752444802b4b6eb14df62cb2035285/FLAG78b7fd92c [2022-07-13 22:20:49,659 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:20:49,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c [2022-07-13 22:20:49,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8571e77/5c752444802b4b6eb14df62cb2035285/FLAG78b7fd92c [2022-07-13 22:20:50,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc8571e77/5c752444802b4b6eb14df62cb2035285 [2022-07-13 22:20:50,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:20:50,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:20:50,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:20:50,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:20:50,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:20:50,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6924b6ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50, skipping insertion in model container [2022-07-13 22:20:50,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:20:50,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:20:50,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-07-13 22:20:50,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:20:50,297 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:20:50,325 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-threaded-sum-3.wvr.c[2957,2970] [2022-07-13 22:20:50,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:20:50,335 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:20:50,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50 WrapperNode [2022-07-13 22:20:50,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:20:50,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:20:50,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:20:50,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:20:50,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,359 INFO L137 Inliner]: procedures = 22, calls = 46, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-13 22:20:50,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:20:50,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:20:50,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:20:50,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:20:50,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:20:50,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:20:50,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:20:50,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:20:50,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (1/1) ... [2022-07-13 22:20:50,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:20:50,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:50,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:20:50,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:20:50,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:20:50,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:20:50,441 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:20:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:20:50,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:20:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-13 22:20:50,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-13 22:20:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:20:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:20:50,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:20:50,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:20:50,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:20:50,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:20:50,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:20:50,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:20:50,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:20:50,444 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:20:50,497 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:20:50,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:20:50,651 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:20:50,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:20:50,694 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:20:50,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:20:50 BoogieIcfgContainer [2022-07-13 22:20:50,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:20:50,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:20:50,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:20:50,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:20:50,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:20:50" (1/3) ... [2022-07-13 22:20:50,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9c1548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:20:50, skipping insertion in model container [2022-07-13 22:20:50,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:20:50" (2/3) ... [2022-07-13 22:20:50,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9c1548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:20:50, skipping insertion in model container [2022-07-13 22:20:50,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:20:50" (3/3) ... [2022-07-13 22:20:50,720 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-threaded-sum-3.wvr.c [2022-07-13 22:20:50,724 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:20:50,730 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:20:50,730 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:20:50,730 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:20:50,786 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-13 22:20:50,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 117 places, 115 transitions, 254 flow [2022-07-13 22:20:50,867 INFO L129 PetriNetUnfolder]: 8/112 cut-off events. [2022-07-13 22:20:50,867 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:20:50,871 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 112 events. 8/112 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 64 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-07-13 22:20:50,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 115 transitions, 254 flow [2022-07-13 22:20:50,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 101 transitions, 220 flow [2022-07-13 22:20:50,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:20:50,887 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3af89662, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4067ba0e [2022-07-13 22:20:50,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-13 22:20:50,910 INFO L129 PetriNetUnfolder]: 8/100 cut-off events. [2022-07-13 22:20:50,910 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-13 22:20:50,910 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:50,911 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:50,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:50,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1016748740, now seen corresponding path program 1 times [2022-07-13 22:20:50,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:50,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253127820] [2022-07-13 22:20:50,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:50,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:51,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253127820] [2022-07-13 22:20:51,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253127820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:51,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:51,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:20:51,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076699417] [2022-07-13 22:20:51,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:51,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:20:51,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:20:51,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:20:51,721 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 115 [2022-07-13 22:20:51,726 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 220 flow. Second operand has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:51,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:51,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 115 [2022-07-13 22:20:51,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:52,251 INFO L129 PetriNetUnfolder]: 349/957 cut-off events. [2022-07-13 22:20:52,251 INFO L130 PetriNetUnfolder]: For 110/121 co-relation queries the response was YES. [2022-07-13 22:20:52,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 957 events. 349/957 cut-off events. For 110/121 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5712 event pairs, 108 based on Foata normal form. 120/948 useless extension candidates. Maximal degree in co-relation 1341. Up to 296 conditions per place. [2022-07-13 22:20:52,261 INFO L132 encePairwiseOnDemand]: 99/115 looper letters, 71 selfloop transitions, 16 changer transitions 3/146 dead transitions. [2022-07-13 22:20:52,261 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 523 flow [2022-07-13 22:20:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 22:20:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-13 22:20:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 801 transitions. [2022-07-13 22:20:52,277 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6965217391304348 [2022-07-13 22:20:52,278 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 801 transitions. [2022-07-13 22:20:52,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 801 transitions. [2022-07-13 22:20:52,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:52,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 801 transitions. [2022-07-13 22:20:52,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.1) internal successors, (801), 10 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,295 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 115.0) internal successors, (1265), 11 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,297 INFO L186 Difference]: Start difference. First operand has 103 places, 101 transitions, 220 flow. Second operand 10 states and 801 transitions. [2022-07-13 22:20:52,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 523 flow [2022-07-13 22:20:52,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 146 transitions, 489 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:20:52,306 INFO L242 Difference]: Finished difference. Result has 110 places, 108 transitions, 291 flow [2022-07-13 22:20:52,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=291, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2022-07-13 22:20:52,311 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-07-13 22:20:52,311 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 291 flow [2022-07-13 22:20:52,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,312 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:52,312 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:52,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:20:52,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1633833426, now seen corresponding path program 1 times [2022-07-13 22:20:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:52,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102612535] [2022-07-13 22:20:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:20:52,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102612535] [2022-07-13 22:20:52,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102612535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:52,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:52,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:20:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117998247] [2022-07-13 22:20:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:52,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:20:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:20:52,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:20:52,650 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 115 [2022-07-13 22:20:52,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 291 flow. Second operand has 7 states, 7 states have (on average 75.28571428571429) internal successors, (527), 7 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:52,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 115 [2022-07-13 22:20:52,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:52,903 INFO L129 PetriNetUnfolder]: 441/1080 cut-off events. [2022-07-13 22:20:52,904 INFO L130 PetriNetUnfolder]: For 429/459 co-relation queries the response was YES. [2022-07-13 22:20:52,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2256 conditions, 1080 events. 441/1080 cut-off events. For 429/459 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6665 event pairs, 97 based on Foata normal form. 0/972 useless extension candidates. Maximal degree in co-relation 1433. Up to 315 conditions per place. [2022-07-13 22:20:52,911 INFO L132 encePairwiseOnDemand]: 108/115 looper letters, 71 selfloop transitions, 7 changer transitions 0/136 dead transitions. [2022-07-13 22:20:52,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 136 transitions, 560 flow [2022-07-13 22:20:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:20:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:20:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2022-07-13 22:20:52,913 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2022-07-13 22:20:52,913 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 552 transitions. [2022-07-13 22:20:52,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 552 transitions. [2022-07-13 22:20:52,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:52,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 552 transitions. [2022-07-13 22:20:52,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,916 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 115.0) internal successors, (920), 8 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,916 INFO L186 Difference]: Start difference. First operand has 110 places, 108 transitions, 291 flow. Second operand 7 states and 552 transitions. [2022-07-13 22:20:52,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 136 transitions, 560 flow [2022-07-13 22:20:52,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 136 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-13 22:20:52,922 INFO L242 Difference]: Finished difference. Result has 113 places, 111 transitions, 318 flow [2022-07-13 22:20:52,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=113, PETRI_TRANSITIONS=111} [2022-07-13 22:20:52,923 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 10 predicate places. [2022-07-13 22:20:52,923 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 111 transitions, 318 flow [2022-07-13 22:20:52,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.28571428571429) internal successors, (527), 7 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:52,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:52,924 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:20:52,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1892032191, now seen corresponding path program 1 times [2022-07-13 22:20:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:52,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141087157] [2022-07-13 22:20:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:53,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:53,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141087157] [2022-07-13 22:20:53,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141087157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:53,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:20:53,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:20:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60222214] [2022-07-13 22:20:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:53,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:20:53,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:20:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:20:53,033 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 115 [2022-07-13 22:20:53,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 111 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:53,034 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:53,034 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 115 [2022-07-13 22:20:53,034 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:53,310 INFO L129 PetriNetUnfolder]: 895/1759 cut-off events. [2022-07-13 22:20:53,310 INFO L130 PetriNetUnfolder]: For 864/868 co-relation queries the response was YES. [2022-07-13 22:20:53,314 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4221 conditions, 1759 events. 895/1759 cut-off events. For 864/868 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10354 event pairs, 56 based on Foata normal form. 4/1660 useless extension candidates. Maximal degree in co-relation 3118. Up to 603 conditions per place. [2022-07-13 22:20:53,322 INFO L132 encePairwiseOnDemand]: 107/115 looper letters, 83 selfloop transitions, 16 changer transitions 0/171 dead transitions. [2022-07-13 22:20:53,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 171 transitions, 722 flow [2022-07-13 22:20:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:20:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:20:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 768 transitions. [2022-07-13 22:20:53,325 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8347826086956521 [2022-07-13 22:20:53,326 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 768 transitions. [2022-07-13 22:20:53,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 768 transitions. [2022-07-13 22:20:53,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:53,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 768 transitions. [2022-07-13 22:20:53,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.0) internal successors, (768), 8 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:53,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:53,330 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:53,330 INFO L186 Difference]: Start difference. First operand has 113 places, 111 transitions, 318 flow. Second operand 8 states and 768 transitions. [2022-07-13 22:20:53,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 171 transitions, 722 flow [2022-07-13 22:20:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 716 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-13 22:20:53,340 INFO L242 Difference]: Finished difference. Result has 122 places, 123 transitions, 441 flow [2022-07-13 22:20:53,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=122, PETRI_TRANSITIONS=123} [2022-07-13 22:20:53,342 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 19 predicate places. [2022-07-13 22:20:53,343 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 123 transitions, 441 flow [2022-07-13 22:20:53,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:53,343 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:53,343 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:20:53,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -344235847, now seen corresponding path program 2 times [2022-07-13 22:20:53,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:53,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507910021] [2022-07-13 22:20:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:53,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:53,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:53,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507910021] [2022-07-13 22:20:53,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507910021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:53,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395654508] [2022-07-13 22:20:53,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:20:53,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:53,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:53,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:53,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:20:53,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-13 22:20:53,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 22:20:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:20:53,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:20:53,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395654508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:53,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:20:53,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-07-13 22:20:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907042542] [2022-07-13 22:20:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:53,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:20:53,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:53,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:20:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-13 22:20:53,834 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 115 [2022-07-13 22:20:53,834 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 123 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:53,834 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:53,835 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 115 [2022-07-13 22:20:53,835 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:54,049 INFO L129 PetriNetUnfolder]: 385/1052 cut-off events. [2022-07-13 22:20:54,050 INFO L130 PetriNetUnfolder]: For 1019/1041 co-relation queries the response was YES. [2022-07-13 22:20:54,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2717 conditions, 1052 events. 385/1052 cut-off events. For 1019/1041 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6425 event pairs, 69 based on Foata normal form. 22/1029 useless extension candidates. Maximal degree in co-relation 2363. Up to 374 conditions per place. [2022-07-13 22:20:54,058 INFO L132 encePairwiseOnDemand]: 106/115 looper letters, 65 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2022-07-13 22:20:54,058 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 154 transitions, 772 flow [2022-07-13 22:20:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:20:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:20:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 697 transitions. [2022-07-13 22:20:54,061 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7576086956521739 [2022-07-13 22:20:54,061 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 697 transitions. [2022-07-13 22:20:54,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 697 transitions. [2022-07-13 22:20:54,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:54,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 697 transitions. [2022-07-13 22:20:54,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 87.125) internal successors, (697), 8 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:54,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:54,064 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 115.0) internal successors, (1035), 9 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:54,065 INFO L186 Difference]: Start difference. First operand has 122 places, 123 transitions, 441 flow. Second operand 8 states and 697 transitions. [2022-07-13 22:20:54,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 154 transitions, 772 flow [2022-07-13 22:20:54,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 154 transitions, 764 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-07-13 22:20:54,073 INFO L242 Difference]: Finished difference. Result has 131 places, 130 transitions, 555 flow [2022-07-13 22:20:54,073 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=555, PETRI_PLACES=131, PETRI_TRANSITIONS=130} [2022-07-13 22:20:54,074 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 28 predicate places. [2022-07-13 22:20:54,075 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 130 transitions, 555 flow [2022-07-13 22:20:54,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.14285714285714) internal successors, (589), 7 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:54,075 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:54,075 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:54,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:54,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1337366013, now seen corresponding path program 1 times [2022-07-13 22:20:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:54,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616490533] [2022-07-13 22:20:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:54,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616490533] [2022-07-13 22:20:54,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616490533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:54,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815156670] [2022-07-13 22:20:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:54,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:54,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:20:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 22:20:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:54,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 22:20:54,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815156670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:20:54,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 22:20:54,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 13 [2022-07-13 22:20:54,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719150407] [2022-07-13 22:20:54,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:20:54,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 22:20:54,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 22:20:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-13 22:20:54,758 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 115 [2022-07-13 22:20:54,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 130 transitions, 555 flow. Second operand has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:54,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:54,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 115 [2022-07-13 22:20:54,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:55,291 INFO L129 PetriNetUnfolder]: 1720/3441 cut-off events. [2022-07-13 22:20:55,292 INFO L130 PetriNetUnfolder]: For 6518/6520 co-relation queries the response was YES. [2022-07-13 22:20:55,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10621 conditions, 3441 events. 1720/3441 cut-off events. For 6518/6520 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23349 event pairs, 530 based on Foata normal form. 135/3539 useless extension candidates. Maximal degree in co-relation 9692. Up to 1319 conditions per place. [2022-07-13 22:20:55,352 INFO L132 encePairwiseOnDemand]: 104/115 looper letters, 129 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2022-07-13 22:20:55,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 211 transitions, 1384 flow [2022-07-13 22:20:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 22:20:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-13 22:20:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 914 transitions. [2022-07-13 22:20:55,355 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7225296442687748 [2022-07-13 22:20:55,355 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 914 transitions. [2022-07-13 22:20:55,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 914 transitions. [2022-07-13 22:20:55,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:55,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 914 transitions. [2022-07-13 22:20:55,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 83.0909090909091) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,359 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 115.0) internal successors, (1380), 12 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,359 INFO L186 Difference]: Start difference. First operand has 131 places, 130 transitions, 555 flow. Second operand 11 states and 914 transitions. [2022-07-13 22:20:55,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 211 transitions, 1384 flow [2022-07-13 22:20:55,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 211 transitions, 1324 flow, removed 18 selfloop flow, removed 4 redundant places. [2022-07-13 22:20:55,372 INFO L242 Difference]: Finished difference. Result has 143 places, 138 transitions, 695 flow [2022-07-13 22:20:55,373 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=695, PETRI_PLACES=143, PETRI_TRANSITIONS=138} [2022-07-13 22:20:55,373 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 40 predicate places. [2022-07-13 22:20:55,374 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 138 transitions, 695 flow [2022-07-13 22:20:55,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.22222222222223) internal successors, (704), 9 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:55,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:55,374 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:55,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:55,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:55,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1203340301, now seen corresponding path program 2 times [2022-07-13 22:20:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485674381] [2022-07-13 22:20:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:55,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:55,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485674381] [2022-07-13 22:20:55,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485674381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:55,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864245664] [2022-07-13 22:20:55,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:20:55,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:55,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:55,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:55,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:20:55,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:20:55,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 22:20:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:20:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:55,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:20:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:56,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864245664] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:20:56,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:20:56,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5] total 16 [2022-07-13 22:20:56,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820417475] [2022-07-13 22:20:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:20:56,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 22:20:56,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:20:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 22:20:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-13 22:20:56,063 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 115 [2022-07-13 22:20:56,064 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 138 transitions, 695 flow. Second operand has 16 states, 16 states have (on average 77.0625) internal successors, (1233), 16 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:56,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:20:56,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 115 [2022-07-13 22:20:56,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:20:57,387 INFO L129 PetriNetUnfolder]: 3623/6128 cut-off events. [2022-07-13 22:20:57,388 INFO L130 PetriNetUnfolder]: For 16364/16364 co-relation queries the response was YES. [2022-07-13 22:20:57,404 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21253 conditions, 6128 events. 3623/6128 cut-off events. For 16364/16364 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37972 event pairs, 198 based on Foata normal form. 159/6252 useless extension candidates. Maximal degree in co-relation 16706. Up to 1034 conditions per place. [2022-07-13 22:20:57,436 INFO L132 encePairwiseOnDemand]: 98/115 looper letters, 249 selfloop transitions, 113 changer transitions 0/422 dead transitions. [2022-07-13 22:20:57,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 422 transitions, 3332 flow [2022-07-13 22:20:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 22:20:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-13 22:20:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2357 transitions. [2022-07-13 22:20:57,441 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7067466266866567 [2022-07-13 22:20:57,441 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2357 transitions. [2022-07-13 22:20:57,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2357 transitions. [2022-07-13 22:20:57,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:20:57,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2357 transitions. [2022-07-13 22:20:57,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 81.27586206896552) internal successors, (2357), 29 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:57,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:57,450 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 115.0) internal successors, (3450), 30 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:57,450 INFO L186 Difference]: Start difference. First operand has 143 places, 138 transitions, 695 flow. Second operand 29 states and 2357 transitions. [2022-07-13 22:20:57,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 422 transitions, 3332 flow [2022-07-13 22:20:57,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 422 transitions, 3222 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-07-13 22:20:57,483 INFO L242 Difference]: Finished difference. Result has 179 places, 228 transitions, 1894 flow [2022-07-13 22:20:57,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=115, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1894, PETRI_PLACES=179, PETRI_TRANSITIONS=228} [2022-07-13 22:20:57,485 INFO L279 CegarLoopForPetriNet]: 103 programPoint places, 76 predicate places. [2022-07-13 22:20:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 228 transitions, 1894 flow [2022-07-13 22:20:57,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.0625) internal successors, (1233), 16 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:20:57,485 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:20:57,485 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:20:57,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:20:57,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:57,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-13 22:20:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:20:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1270315933, now seen corresponding path program 3 times [2022-07-13 22:20:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:20:57,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443454008] [2022-07-13 22:20:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:20:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:20:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:20:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:20:59,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:20:59,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443454008] [2022-07-13 22:20:59,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443454008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:20:59,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420431628] [2022-07-13 22:20:59,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:20:59,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:20:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:20:59,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:20:59,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:20:59,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:20:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:20:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 22:20:59,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:21:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:00,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:21:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:21:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420431628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:21:29,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:21:29,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-13 22:21:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416548913] [2022-07-13 22:21:29,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:21:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 22:21:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:21:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 22:21:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 22:21:29,448 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 115 [2022-07-13 22:21:29,450 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 228 transitions, 1894 flow. Second operand has 39 states, 39 states have (on average 68.38461538461539) internal successors, (2667), 39 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:21:29,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:21:29,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 115 [2022-07-13 22:21:29,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:21:49,181 WARN L233 SmtUtils]: Spent 14.24s on a formula simplification. DAG size of input: 226 DAG size of output: 217 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:22:17,343 WARN L233 SmtUtils]: Spent 25.86s on a formula simplification. DAG size of input: 234 DAG size of output: 226 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:22:30,272 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 169 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:22:45,763 WARN L233 SmtUtils]: Spent 14.61s on a formula simplification. DAG size of input: 242 DAG size of output: 229 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:23:01,833 WARN L233 SmtUtils]: Spent 13.87s on a formula simplification. DAG size of input: 250 DAG size of output: 238 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:23:45,977 WARN L233 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 219 DAG size of output: 211 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-13 22:24:01,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []